<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        #content{
            background-color: darkgray;
            width: 700px;
            height: 800px;
            margin: auto;
            padding-top: 5px;
        }
    
        #top{
            background-color: deeppink;
            width: 690px;
            height: 120px;
            margin-left: 5px;
        }
    
        #left{
            background-color: deepskyblue;
            width: 200px;
            height: 670px;
            margin-left: 5px;
            margin-top: 5px;
            float: left;
        }
    
        #right{
            background-color: goldenrod;
            width: 485px;
            height: 670px;
            float: left;
            margin-top: 5px;
            margin-left: 5px;
        }
    </style>
</head>
<body>
    <div id="content">
        <div id="top"></div>
        <div id="left"></div>
        <div id="right"></div>
    </div>
    
</body>
</html>